Rmove unique constraint on tasks.name (closes #1001)

changelog/60_UNRELEASED_2020-xx-xx.md

@@ -99,6 +99,9 @@ _- (Because the stock quantity unit is now the base for everything, it cannot be
 - Fixed a PHP warning when using the "Share/Integrate calendar (iCal)" button (thanks @tsia)
 - Fixed that "Track date only"-chores were always displayed at 12am (are now displayed as all-day events)
 
+### Tasks improvements
+- Tasks don't need to unique anymore (name field)
+
 ### Userfield improvements/fixes
 - New Userfield type "File" to attach any file, will be rendered as a link to the file in tables (if enabled) (thanks @fipwmaqzufheoxq92ebc)
 - New Userfield type "Picture" to attach a picture, the picture will be rendered (small) in tables (if enabled) (thanks @fipwmaqzufheoxq92ebc)

migrations/0118.sql

@@ -0,0 +1,22 @@
+PRAGMA legacy_alter_table = ON;
+
+ALTER TABLE tasks RENAME TO tasks_old;
+
+CREATE TABLE tasks (
+	id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
+	name TEXT NOT NULL,
+	description TEXT,
+	due_date DATETIME,
+	done TINYINT NOT NULL DEFAULT 0 CHECK(done IN (0, 1)),
+	done_timestamp DATETIME,
+	category_id INTEGER,
+	assigned_to_user_id INTEGER,
+	row_created_timestamp DATETIME DEFAULT (datetime('now', 'localtime'))
+);
+
+INSERT INTO tasks
+	(id, name, description, due_date, done, done_timestamp, category_id, assigned_to_user_id, row_created_timestamp)
+SELECT id, name, description, due_date, done, done_timestamp, category_id, assigned_to_user_id, row_created_timestamp
+FROM tasks_old;
+
+DROP TABLE tasks_old;